197785722456 has 128 divisors (see below), whose sum is σ = 631521446400. Its totient is φ = 56183483520.

The previous prime is 197785722439. The next prime is 197785722469. The reversal of 197785722456 is 654227587791.

197785722456 is a `hidden beast` number, since 1 + 9 + 7 + 7 + 8 + 572 + 2 + 4 + 56 = 666.

197785722456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 197785722393 and 197785722402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116490 + ... + 639641.

It is an arithmetic number, because the mean of its divisors is an integer number (4933761300).

Almost surely, 2^197785722456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197785722456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315760723200).

197785722456 is an abundant number, since it is smaller than the sum of its proper divisors (433735723944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197785722456 is a wasteful number, since it uses less digits than its factorization.

197785722456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756326 (or 756316 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 63.

The spelling of 197785722456 in words is "one hundred ninety-seven billion, seven hundred eighty-five million, seven hundred twenty-two thousand, four hundred fifty-six".